Polyglot Reader vs Duoreader
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Polyglot Reader
Read books in foreign languages and learn new vocabulary. Tap on unknown words for instant translations and save them to flashcards for later study. Supports various document formats and offers pronunciation practice and knowledge tests.
- Read books in multiple formats (PDF, EPUB, TXT)
- Translate unknown words and phrases instantly
- Create flashcards for vocabulary learning
- Pronunciation support for words and phrases
- Knowledge tests for vocabulary sets
- Scan and recognize text from documents
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Read books in any foreign language and turn every unknown word into a flashcard you'll actually remember. Version 5.0 brings a complete redesign — a calmer reader, a smarter library and a new way to study. Polyglot Reader is your pocket library, dictionary and flashcard trainer in one app. Tap any word or phrase in a book, get an instant translation with transcription, hear the pronunciation, and save it to a deck to review later. Built for iPhone, iPad and Mac, with a refined dark theme. — READ — • Completely redesigned reader, bookmarks, translation popup and settings • New System theme that follows iOS automatically, plus refined Light and Dark • Open books in PDF, EPUB, FB2, RTF and TXT • Import from Dropbox, Google Drive, OneDrive or any file app • Scan a paper page — the app recognizes the text and saves it as a book • Highlights words you don't know yet, right inside the page • Vertical scrolling, comfortable type settings, picture zoom — LIBRARY — • Thousands of free classic books in 38+ languages, sorted into sections like Classics, Sherlock Holmes, Shakespeare, Horror & Mystery, Children's Books, Philosophy, Adventure • Adapted A2–B1 readers for German learners, plus original literature in English, French, Spanish, Italian, Russian, Japanese, Chinese, Latin, Greek and many more • New sorting, new sections and search inside every shelf • Filter to show only recent books • Difficulty level and tags shown right on each cover • Drag and drop to reorganize your shelves • New "Added manually" section for everything you imported yourself • Smoother search, scroll and sharing on iPad — LEARN — • Redesigned cards and study screens • Ready-made flashcard sets for English, Spanish, Portuguese, Russian, Chinese and Japanese — verbs, nouns and themed categories • Smart virtual decks: All cards, Recent, Unknown — see progress at a glance • Quick preview and actions inside every deck • Pick a default deck for new words you save while reading • Per-card knowledge level with a colored progress bar (red → green as you master each word) • Three study modes: foreign only, foreign + native, native only • Hands-free mode — keep learning without touching the screen • Long-press context menu: mark as known or unknown in one tap • Optional shuffled order during study • Filter to show only words you haven't learned yet • Pronunciation for both the word and its translation • Knowledge tests for every deck • Export and import cards in CSV — TRANSLATE — • 111 offline dictionaries — no internet, no quota • On-the-fly transcription for all popular languages • Speech-to-text: just say the word, get the translation • Translate your own phrases and add them to any deck • Edit translations when you want a better wording • 90+ languages supported, including Arabic, Chinese, Dutch, English, French, German, Greek, Hebrew, Hindi, Italian, Japanese, Korean, Latin, Polish, Portuguese, Russian, Spanish, Swedish, Turkish, Ukrainian, Vietnamese and many more — AND ALSO — • System, Light and Dark themes • Choose Google or Yandex as default online translator • Compact mode on iPhone, expanded card view on iPad • Notifications to bring you back to recent cards Whether you're reading Sherlock Holmes in English, Kafka in German, Don Quijote in Spanish or Dostoevsky in Russian — Polyglot Reader turns reading into vocabulary, one tap at a time. Questions or feedback: support@readandlearnapp.com
Duoreader
Read books and articles in two languages simultaneously, with sentence-by-sentence translations and audio support. Improve language skills naturally while enjoying literature and news. Supports custom imports and AI-powered explanations.
- Sentence-by-sentence bilingual translation
- AI-powered dictionary
- Advanced text-to-speech with multiple voices
- Import custom ePUB and PDF files
- Wide range of classic and modern texts
- Supports multiple languages
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Duoreader makes it easy to read bilingual texts by aligning translations sentence by sentence. You can enjoy the beauty of the originals while improving your language skills naturally. Whether you are studying a language, reading literature, or listening to books, Duoreader provides a smooth and intelligent reading experience. What's new: * Support for custom books: import and read your own ePUB and PDF files * Smarter dictionary powered by ChatGPT for richer and more natural explanations * Advanced text-to-speech (TTS) with multiple voices and adjustable speed * AI live translation powered by large language models for real-time bilingual reading * Improved library with book filtering, book info pages, and infinite scrolling * Updated user interface with a cleaner and more immersive design Duoreader supports many languages including Chinese, English, French, Spanish, Italian, Japanese, Arabic, and Russian, with more to come. The read-aloud feature lets you choose different accents, voices, and speeds, making language learning and listening effortless. The library includes a wide range of public-domain classics such as Pride and Prejudice, A Tale of Two Cities, Twenty Thousand Leagues Under the Sea, Alice in Wonderland, Around the World in Eighty Days, 1984, Animal Farm, Gulliver’s Travels, Oliver Twist, and The Little Prince, along with multilingual modern articles and official United Nations stories. Bring your own books and explore the world of language and literature with Duoreader.
Screenshots
Verdict
The clearest difference is in-app purchases: Duoreader at none against Polyglot Reader's 11. Duoreader also leads on ads (none vs shown). Polyglot Reader's advantage is rating (4.4 vs 4.1) and ratings volume (74 vs 15). On price, review sentiment, update cadence and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Polyglot Reader sells 11 in-app purchases, starting at $3.99 per month. Duoreader asks for nothing beyond the download.
Polyglot Reader holds the better App Store score, 4.4 against 4.1. Both are backed by a comparable volume of ratings — 74 and 15 respectively. Written reviews point the same way: 66% of Polyglot Reader's written reviews are positive against 63% of Duoreader's.
Polyglot Reader ships an update every 2 months, Duoreader every 3 months. The most recent releases landed on September 28, 2026 and September 26, 2026 respectively.
| Parameter | Polyglot Reader | Duoreader |
|---|---|---|
| Price | Free | Free |
| Rating | 4.4 (74 ratings) — better | 4.1 (15 ratings) |
| Positive reviews | 65.7% of reviews — better | 62.5% of reviews |
| Number of ratings | 74 — better | 15 |
| Update frequency | Every 2 months — better | Every 3 months |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 16.0 | 15.0 — better |
| Further details — not scored | ||
| Size | 120 MB | 55 MB |
| Age rating | 4+ | 12+ |
| Developer | Anton Ivanov | Xing Chen |
Customer experience
Polyglot Reader
Duoreader
In-app purchases
Polyglot Reader
- Monthly subscription$3.991 Month
- Monthly subscription3 Days trial$7.991 Month
- Monthly subscription$7.991 Month
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- Monthly subscription$9.991 Month
- Annual subscription$22.991 Year
- Annual subscription$34.991 Year
- Annual subscription7 Days trial$39.991 Year
- Annual subscription$59.991 Year
- Upgrade from advanced to professional version$3.99
- Upgrade from Starter to Advanced version$15.99
- Full version$99.99
Duoreader
No in-app purchases







